CN1811484A - Magnetic resonance equipment and integral combined grads and high frequency loop unit - Google Patents
Magnetic resonance equipment and integral combined grads and high frequency loop unit Download PDFInfo
- Publication number
- CN1811484A CN1811484A CN200610005175.7A CN200610005175A CN1811484A CN 1811484 A CN1811484 A CN 1811484A CN 200610005175 A CN200610005175 A CN 200610005175A CN 1811484 A CN1811484 A CN 1811484A
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- CN
- China
- Prior art keywords
- gradient
- coil unit
- high frequency
- magnetic resonance
- wiring board
- Prior art date
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34046—Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/385—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34007—Manufacture of RF coils, e.g. using printed circuit board technology; additional hardware for providing mechanical support to the RF coil assembly or to part thereof, e.g. a support for moving the coil assembly relative to the remainder of the MR system
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
- G01R33/3628—Tuning/matching of the transmit/receive coil
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Heart & Thoracic Surgery (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Biophysics (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Pathology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Radiology & Medical Imaging (AREA)
- High Energy & Nuclear Physics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
A magnetic resonance apparatus (1) has an integrated gradient and radio frequency coil unit (9) that includes at least one antenna rod (19, 19B, 19C) with a conductor (29) and a gradient coil unit (11, 13). At least one electrical connection exists between the conductor and an electrical contact region arranged at an adjoining region of the gradient coil unit (11). The electrical connection is formed by a flexible circuit board (31, 43) that is electrically connected both with the conductor (29) and with the contact region. Such an electrical connection of the antenna rod (19, 19B, 19C) is insensitive to strong vibrations.
Description
Technical field
The present invention relates to a kind of gradient of an integrated combination and magnetic resonance equipment of high frequency coil unit of having, wherein, described gradient and high frequency coil unit have at least one aerial rod that has a lead and a gradient coil unit, wherein, electrically contacting to exist at least between the district and be electrically connected on this lead and an adjacent area that is arranged on this gradient coil unit.In addition, the invention still further relates to a kind of like this gradient and high frequency coil unit.
Background technology
Mr techniques is a kind of known technology that is used to obtain an inspection object in-vivo image.Wherein, the gradient magnetic that will be communicated with fast in a magnetic resonance equipment (MR equipment) is added on the basic magnetic field that is produced by basic magnetic field magnet.These gradient magnetics are produced by a gradient coil unit.For being injected into high-frequency signal (HF signal) by a high frequency antenna, excite magnetic resonance signals checks in the subject.For the locus minimum that gradient coil unit and high frequency coil unit are occupied, adopt the gradient and the high frequency coil unit of integrated combination.This gradient and high frequency coil unit bear violent vibrations when work.This may cause damaged member, for example makes the fracture of welding contact.Be connected on the gradient coil unit or be connected situation on high frequency (HF) shielding part that lays of there for antenna element, especially have such danger.
In hollow cylinder MR equipment, design described gradient coil unit like this, that is, form the slit or the free space of the rod that fixes up an aerial wire vertically in central authorities.The high-frequency current that is produced by high-frequency electric field flows along described linkage section.Common described gradient coil unit is local at least to be held by described radioshielding spare, and described aerial rod is cast in a casting cycle of the gradient of described integrated combination and high frequency coil unit together.Now when the MR equipment operation, gradient coil with respect to aerial rod just with the amplitude flutter in the micrometer range.Aerial rod is in the frequency range that is up to about 4kHz with respect to the movement/vibration of the described HF shielding part that casts in gradient coil, and the maximum deflection amount is tens microns in the frequency range of 900Hz.
Because described relative motion, the tie point of described aerial rod on the HF shielding part bears load.The electrical connection of this mode has proposed such target, that is, and and create a kind of low as far as possible induction and being connected of loss less.For this reason, adopt wide both solderings rigidly at the also soldering band of soldering rigidly on shielding part on the slab.Also can carry out the welding of rigidity on electric member (for example HF choking coil), wherein, these electric members additionally fix by bonding.
Usually requirement, described electrical connection will influence antenna performance (that is, no imbalance effect, high frequency stability ...) as few as possible.
The connection of reinforcing or rigidity considers it is best from the angle of conduction.But understand tuning (performance, the resonant frequency ...) of externality for antenna as the linkage section of an antenna part.Therefore, linkage section has alap effective inductance rate and the loss in linkage section has decisive meaning.Generally speaking, do not allow owing to vibration or move to change connection performance.
But this class connects and also has shortcoming.When for example connecting the copper (for example 1mm) that adopts " thick ", the connection at the solder joint place on printed-wiring board (PWB) or HF shielding part may be split, because in order to suppress the gradient eddy current, can only adopt the copper strips of 9 μ m or 18 μ m thickness there.If adopt " thin " copper strips (0.1 ... 0.2mm), then may crackle appear in linkage section inside.
People attempt taking different measure to reduce vibration, so that can keep a kind of like this " rigidity " connectivity scenario.Therefore, for improve with mould material between be connected and improve adhesion effect generally, people handle HF shielding part surface.In addition, on printed-wiring board (PWB)/HF shielding part, adopt to reinforce anchor and complementary making reinforced anchor and inserted in the HF shielding part, but be to insert limitedly, not airtight because the HF shielding part does not allow.In addition, the intensity of gradient coil also can be improved by pack into glass and fiberglass-reinforced plastic lever.But all these measures still can not realize desired reliability of electrical connection.
Summary of the invention
Technical matters to be solved by this invention is, avoids vibrating the adverse effect for the electrical connection of described aerial rod, that is to say, guarantee mechanical stability and guarantee that simultaneously antenna performance can not change because of vibration.
Above-mentioned technical matters can have the gradient of an integrated combination and the magnetic resonance equipment of high frequency coil unit solves by a kind of, wherein, described gradient and high frequency coil unit have at least one aerial rod that has a lead and a gradient coil unit, wherein, there is at least one section of electrical connection between the conduction contact area that on described lead and a adjacent area, is provided with at described gradient coil unit, according to the present invention, described electrical connection section have a flexibility, not only with described lead but also the wiring board that is connected with described contact area conduction.
Above-mentioned technical matters also can solve by a kind of gradient and high frequency coil unit of integrated combination, this gradient and high frequency coil unit have at least one aerial rod that has a lead and a gradient coil unit, wherein, there is at least one section of electrical connection between the conduction contact area that on described lead and a adjacent area, is provided with at described gradient coil unit, according to the present invention, described electrical connection section have a flexibility not only with described lead but also the wiring board, for example printed wiring board that are connected with described contact area conduction.
Technical scheme of the present invention has beat all technique effect, promptly, although have flexible member (especially suitably selecting under the situation of coating thickness and wiring board thickness) but do not influence the characteristic of antenna oscillatory circuit itself, and following high request is also satisfied in described electrical connection:
Freedom from vibration
Low inductivity for the HF antenna
Low loss (the maximum 30A of each aerial rod current amplitude)
Can not be subjected to the influence or the heating of gradient eddy current
Can not change antenna performance owing to the vibration and the motion of antenna
Can be applicable under the narrow space condition.
Cancelled the elastic property that mechanical rigidity soldering connects and the substitute is the wiring board that utilizes flexibility according to this novel connected mode of the present invention.The flexural property of flexible wiring board is given the described elasticity that is electrically connected a kind of spring of section, even this elasticity still can protect soldering point to avoid damaging when the judder of experience long period.Under these circumstances, with some circuit, for example an antenna circuit or a detuned circuit are connected with described contact area conduction.Wherein, described contact area be positioned at an aerial rod near, for example be arranged on the gradient coil unit of support effect, such as being arranged on the printed conductor that laid of there or (when this HF shielding part for example is described HF circuit a part of) on the HF shielding part of described gradient coil.
In one embodiment of the invention, a lead of the antenna circuit on aerial rod is connected with described HF shielding part conduction by the printed-wiring board (PWB) of a flexibility.In another embodiment, a contact that is used for the feed wire of a detuned circuit is connected by the electric contact conduction that a flexible print circuit board and this are in the detuned circuit on the aerial rod equally equally.
According to width and the thickness of advantageously adjusting this printed-wiring board (PWB) along the current flowing amount of flexible print circuit board like this, that is, avoid superheated.
Advantageously select the radius-of-curvature of this printed-wiring board (PWB) like this, that is, and for a for example copper coating and as far as possible little and insensitive to vibrating for the load of described back up pad.
Based on the electrical connection that realizes according to employing flexible print circuit board of the present invention, the electric member of described detuned circuit, especially choking coil can be embedded at least in part in the antenna conductor plate of described aerial rod and especially bond together, even if make that thus these electric members also just also bear the vibration that weakens with this antenna conductor plate.
According to the present invention, a plurality of such electrical connection sections can be set side by side.
The wiring board of described flexibility preferably can be made by polyimide.
Description of drawings
Below by accompanying drawing 1 to 4 explanation two kinds of embodiments of the present invention.In the accompanying drawing:
Fig. 1 represents the sectional view of the magnetic resonance equipment of a gradient that has an integrated combination and high frequency coil unit;
Fig. 2 represents the partial view according to a technical solution of prior art;
The signal sketch that the wiring board that Fig. 3 represents to adopt a flexibility according to the present invention couples together the radioshielding spare of an aerial rod and gradient coil unit;
Fig. 4 represents to adopt the wiring board of a flexibility to realize the signal sketch that the feed to a detuned circuit connects;
Embodiment
Fig. 1 represents a magnetic resonance equipment 1 with the cylindrical photographed region 3 that is used for the patient, the patient by means of one patient bed 5 with an examine zone location in the inspection area of magnetic resonance equipment FOV (also claiming visual field FOV:Field of view).Have a uniform as far as possible basic magnetic field in this inspection area, this magnetic field, basis is produced by a basic magnetic field magnet 7.For excite magnetic resonance signals is injected into a high-frequency signal in the described inspection area.By gradient magnetic and basic magnetic field superposition can be realized the coding location.Gradient magnetic and HF (high frequency) magnetic field produces by the gradient and the high frequency coil unit 9 of an integrated combination.This gradient and high frequency coil unit 9 comprise gradient coil 11, secondary gradient coil 13, one basically around the HF shielding part 15 of this coil unit, the liner that this shielding part also constitutes a flux return chamber 17.Pour into a mould this flux return chamber 17 with filler and casting resin, thus aerial rod 19 is settled and is fixed in the middle section simultaneously.
Central annular zone is the lead of gradient coil 11 once.Described aerial rod 19 is distributed in this annular free space by an orientation, and connects between two sections of described HF shielding part 15 for high-frequency current.The affiliated magnetic line of force of described high frequency magnetic field is closed communicating in described flux return chamber 17.
Fig. 2 to 4 represents from aerial rod 19 to radioshielding spare 15 transition join domain respectively with partial view.
Similarly transitional region for example also is present in the integrated combined type gradient and high frequency coil unit that is applied in the open MR equipment that for example is designed to dish type.
Fig. 2 represents the technical scheme that known rigidity soldering linkage section 21 by means of an angled design is realized for the connection of the antenna conductor on the aerial rod 19A.In addition, express briefly a choking coil 23 for example how with a printed conductor or ribbon conductor 25 soldering rigidly together, wherein, these printed conductor 25 electrical isolation ground extend on a radioshielding spare 15A.This choking coil 23 was finished by a rigidity soldering tie point 27B with being connected also of a detuned circuit.These soldering tie points 21 and 27A, 27B are potential thin spots, for example can constitute the breakaway poing in the soldering connection.
Fig. 3 represents exemplary sketch that the antenna conductor 29 on the aerial rod 19B is connected with a radioshielding spare 15B.Implement with being connected of radioshielding spare 15B by the printed-wiring board (PWB) 31 of one or more flexibilities.Wherein, an end of Rou Xing printed-wiring board (PWB) 31 is welded in the longitudinal joint of " interior zinc-plated " of aerial rod 19B.The other end of this printed-wiring board (PWB) 31 then with the radioshielding spare 15B soldering of gradient coil unit together.Distance between described longitudinal joint and the radioshielding spare 15B be approximately 5mm and correspondingly the radius of curvature R of this printed-wiring board (PWB) be approximately 5mm equally.In order to keep less inductivity, advantageously adopt a plurality of such flexible print circuit boards side by side, wherein, each printed-wiring board (PWB) has the width of an about 8mm.Flexible print circuit board 31 has the thick base material of 50 μ m that is made of polyimide in an illustrative embodiments.The both sides of this base material 33 are respectively the thick copper layers 35 of the about 18 μ m of one deck.This copper layer is for example bonding with base material 33 or directly be connected contiguously with base material 33.In order to protect this copper layer 35 to scribble one deck protective paint in its outside.Described two copper layers interconnect by the contacting that extends through base material 33 in the zone of soldering point.
Conductive lead wire for to the choking coil (DC feedback) of the detuned circuit of high frequency antenna also can adopt flexible printed-wiring board (PWB), but separate with the electrical connection section that is connected the HF antenna function.Fig. 4 represents an exemplary sketch.By an electrical isolation the printed conductor 41 on the radioshielding element 15C of the gradient coil unit that is laid in carry out DC feedback.The printed-wiring board (PWB) 43 of one flexibility is welded on this lead 41 and again with the bend radius to of an about 5mm downwards approximately on the aerial rod 19C of 10mm.A lead of this printed-wiring board (PWB) 43 and described detuned circuit soldering on the width of about 4mm there.For the choking coil 45 of protecting one to be applied in the described detuned circuit, this choking coil 45 partly is embedded among the aerial rod 19C and is bonded in wherein.Described choking coil 45 is connected with printed-wiring board (PWB) 43 conductions of described flexibility.
Even if Fig. 3 with 4 in the electrical connection of expression at high Oscillation Amplitude with bear for a long time that also to avoid soldering to be connected when loading destroyed.Electric member by installation shown in Figure 4 can be owing to vibration is damaged yet.Even if under the situation of bearing for a long time up to the stress alternation of the frequency of several KHz also is like this.Realize big bending radius by space that can be little in a blind hole or longitudinal joint with the flexible print circuit board soldering, and big bending radius can be stood mechanical load.
Claims (20)
1. one kind has the gradient of an integrated combination and the magnetic resonance equipment (1) of high frequency coil unit (9), wherein, this gradient and high frequency coil unit (9) have at least one aerial rod (19 that has a lead (29), 19B, 19C) with a gradient coil unit (11,13), wherein, in this lead (29) and at least one electrical connection section of existence between the conduction contact area that is provided with on the adjacent area of described gradient coil unit (11), it is characterized by: the printed-wiring board (PWB) (31 that this electrical connection section has a flexibility, 43), this flexible printed-wiring board (PWB) both also was connected with described contact area conduction with described lead (29).
2. according to the described magnetic resonance equipment of claim 1 (1), it is characterized by: described lead (29) is the part of an antenna circuit.
3. according to claim 1 or 2 described magnetic resonance equipments (1), it is characterized by: described contact area is a zone that centers on the radioshielding spare (15B, 15C) of described gradient coil at least partly.
4. according to the described magnetic resonance equipment of claim 1 (1), it is characterized by: described lead is the part of a detuned circuit.
5. according to the described magnetic resonance equipment of claim 4 (1), it is characterized by: described contact area is a section of a feed wire (25) of described detuned circuit.
6. according to each described magnetic resonance equipment (1) in the claim 1 to 5, it is characterized by: the printed-wiring board (PWB) of described flexibility (31,34) has one several millimeters width.
7. according to each described magnetic resonance equipment (1) in the claim 1 to 6, it is characterized by: the printed-wiring board (PWB) of described flexibility (31,34) has the radius-of-curvature of an about 5mm.
8. according to each described magnetic resonance equipment (1) in the claim 1 to 7, it is characterized by: the printed-wiring board (PWB) of described flexibility (31,34) is made by polyimide.
9. according to each described magnetic resonance equipment (1) in the claim 1 to 8, it is characterized by: a member of described detuned circuit, especially a choking coil (45) are embedded in the antenna conductor plate of described aerial rod (19C) at least in part and especially bond together with this antenna conductor plate.
10. according to each described magnetic resonance equipment (1) in the claim 1 to 9, it is characterized by: a plurality of such electrical connection sections are set side by side.
11. the gradient of an integrated combination and high frequency coil unit (9), it has at least one aerial rod (19 that has a lead (29), 19B, 19C) with a gradient coil unit (11,13), wherein, between the conduction contact area that is provided with on the adjacent area of described gradient coil unit (11), exist at least one to be electrically connected section at this lead (29) and, it is characterized by: described section the wiring board (31 that is electrically connected with a flexibility, 43), this flexible wiring board both also was connected with described contact area conduction with described lead (29).
12. according to described gradient of claim 11 and high frequency coil unit (9), it is characterized by: described lead (29) is the part of an antenna circuit.
13. according to claim 11 or 12 described gradients and high frequency coil unit (9), it is characterized by: described contact area is a zone that centers on the radioshielding spare (15B) of described gradient coil (11) at least partly.
14. according to each described gradient in the claim 11 to 13 and high frequency coil unit (9), it is characterized by: described lead (29) is the part of a detuned circuit.
15. according to described gradient of claim 14 and high frequency coil unit (9), it is characterized by: described contact area is a zone of a feed wire (25) of described detuned circuit.
16. according to each described gradient in the claim 11 to 15 and high frequency coil unit (9), it is characterized by: the wiring board of described flexibility (31,34) has one several millimeters width.
17. according to each described gradient in the claim 11 to 16 and high frequency coil unit (9), it is characterized by: the wiring board of described flexibility (31,34) has the radius-of-curvature of an about 5mm.
18. according to each described gradient in the claim 11 to 17 and high frequency coil unit (9), it is characterized by: the wiring board of described flexibility (31,34) is made by polyimide.
19. according to each described gradient in the claim 11 to 18 and high frequency coil unit (9), it is characterized by: a choking coil (45) of described detuned circuit is embedded in the antenna conductor plate of described aerial rod (19C) at least in part and especially bonds together with this antenna conductor plate.
20., it is characterized by: a plurality of such electrical connection sections are set side by side according to each described gradient in the claim 11 to 19 and high frequency coil unit (9).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005003670.8 | 2005-01-26 | ||
| DE102005003670 | 2005-01-26 | ||
| DE102005058651.1 | 2005-12-08 | ||
| DE102005058651A DE102005058651B4 (en) | 2005-01-26 | 2005-12-08 | Magnetic resonance device and integrated gradient and radio frequency coil unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1811484A true CN1811484A (en) | 2006-08-02 |
| CN1811484B CN1811484B (en) | 2010-05-26 |
Family
ID=36686520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610005175.7A Expired - Fee Related CN1811484B (en) | 2005-01-26 | 2006-01-13 | Magnetic resonance equipment and integral combined grads and high frequency loop unit |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7239141B2 (en) |
| CN (1) | CN1811484B (en) |
| DE (1) | DE102005058651B4 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102722932A (en) * | 2012-06-19 | 2012-10-10 | 兰州大学 | Magnetic head of currency detector |
| CN109613459A (en) * | 2018-12-06 | 2019-04-12 | 厦门大学 | The micro-fluidic plane gradient coil of superconducting pulse nuclear magnetic resonance chemical analyser and mounting bracket |
| CN110007259A (en) * | 2018-01-04 | 2019-07-12 | 布鲁克碧奥斯平股份公司 | NMR shimming system |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006057395A1 (en) * | 2004-11-29 | 2006-06-01 | Hitachi Medical Corporation | Magnetic resonance imaging device |
| EP2033004A1 (en) * | 2006-06-15 | 2009-03-11 | Koninklijke Philips Electronics N.V. | Silent and thin rf body coil |
| WO2008053451A1 (en) * | 2006-11-03 | 2008-05-08 | Koninklijke Philips Electronics N.V. | Split gradient coil for mri |
| US7576542B1 (en) | 2008-06-26 | 2009-08-18 | General Electric Co. | System and apparatus for providing electrical and cooling interconnections in a magnetic resonance imaging (MRI) system |
| WO2018019972A1 (en) * | 2016-07-28 | 2018-02-01 | Koninklijke Philips N.V. | Method and control unit for operating a gradient coil device of an mri system or another periodically stressed device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19503833C2 (en) * | 1995-02-06 | 1998-05-14 | Siemens Ag | Magnetic resonance imaging device with a combination of high-frequency antenna and gradient coil |
| US5594339A (en) * | 1995-07-11 | 1997-01-14 | Picker International, Inc. | Flexible nuclear magnetic resonance receiver coils and systems |
| GB0006356D0 (en) * | 2000-03-17 | 2000-05-03 | Mansfield Peter | Active acoustic control in gradient coil design for MRI |
| US6925322B2 (en) * | 2002-07-25 | 2005-08-02 | Biophan Technologies, Inc. | Optical MRI catheter system |
| CN1497261A (en) * | 2002-10-04 | 2004-05-19 | 西门子公司 | Magnetic resonance equipment with gradient coil system |
| DE10246310A1 (en) * | 2002-10-04 | 2004-04-22 | Siemens Ag | Gradient coil system for MRI machine is made up of two or more units fixed into tubular casing using adhesive |
| DE102004012058B4 (en) * | 2003-03-25 | 2009-04-02 | Siemens Ag | Producer of time-variable magnetic fields of a magnetic resonance apparatus and magnetic resonance apparatus with the producer |
| CN100507593C (en) * | 2003-03-25 | 2009-07-01 | 西门子公司 | Magnetic fields generator and magnetic resonance apparatus with the same |
| DE10353343B3 (en) * | 2003-11-14 | 2005-08-25 | Siemens Ag | Magnetic resonance apparatus with a high-frequency screen lying on a reference potential |
-
2005
- 2005-12-08 DE DE102005058651A patent/DE102005058651B4/en not_active Expired - Fee Related
-
2006
- 2006-01-13 CN CN200610005175.7A patent/CN1811484B/en not_active Expired - Fee Related
- 2006-01-26 US US11/340,216 patent/US7239141B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102722932A (en) * | 2012-06-19 | 2012-10-10 | 兰州大学 | Magnetic head of currency detector |
| CN110007259A (en) * | 2018-01-04 | 2019-07-12 | 布鲁克碧奥斯平股份公司 | NMR shimming system |
| CN109613459A (en) * | 2018-12-06 | 2019-04-12 | 厦门大学 | The micro-fluidic plane gradient coil of superconducting pulse nuclear magnetic resonance chemical analyser and mounting bracket |
Also Published As
| Publication number | Publication date |
|---|---|
| US20060208736A1 (en) | 2006-09-21 |
| US7239141B2 (en) | 2007-07-03 |
| DE102005058651A1 (en) | 2006-08-03 |
| DE102005058651B4 (en) | 2012-02-16 |
| CN1811484B (en) | 2010-05-26 |
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